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Cobalt ion-enhanced photochemical vapor generation in a mixed acid medium for sensitive detection of tellurium(IV) by atomic fluorescence spectrometry.
- Source :
-
JAAS (Journal of Analytical Atomic Spectrometry) . Jul2020, Vol. 35 Issue 7, p1405-1411. 7p. - Publication Year :
- 2020
-
Abstract
- A method of cobalt ion assisted enhancement of photochemical vapor generation-atomic fluorescence spectrometry (PVG-AFS) was proposed for sensitive determination of ultratrace tellurium(IV). With a mixture of 5% (v/v) formic acid and 20% (v/v) acetic acid as the reaction medium, more than 13-fold improvement in AFS intensity for Te(IV) was achieved simply by adding 1 mg L−1 Co2+ as a homogeneous catalyst. A possible reaction mechanism was proposed with the characterization results of GC-MS and electron paramagnetic resonance (EPR). Under optimal conditions, the limit of detection (LOD) for Te(IV) was 0.06 μg L−1, with a relative standard deviation (RSD) of 1.3% (10 μg L−1 Te, 7 times). The accuracy and utility of this methodology were validated by analysis of real water samples, with satisfactory recoveries of 91–108%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02679477
- Volume :
- 35
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- JAAS (Journal of Analytical Atomic Spectrometry)
- Publication Type :
- Academic Journal
- Accession number :
- 145453419
- Full Text :
- https://doi.org/10.1039/d0ja00076k